Improvement in telegraph-insulators



N. H EN D E E KS.

s'eeg raph insu laters.

Patented Jan. 28,1873.

UNrTED STATES PATENT OFFICE.

NATHAN HENDRICKS, OF JERSEY CITY, NEW JERSEY.

iMPRQVEMENT IN TELEGRAPH-INSULATORS.

Specification formingpart of Letters Patent- No. 135,334, dated January 28, 1872.

To all whom it may concern:

Be it known that I, NATHAN HENDRICKS, of Jersey City, county of Hudson and State of New Jersey, have invented a new and Improved Telegraph-Insulator; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making part of this specification, in which- Figure l is a perspective view of the insulator. Fig. 2 is a vertical section through the same.

Similar letters of reference indicate corresponding parts in the two figures.

The object of this invention is to improve insulators for telegraph-wires by inserting the head of the bar to which the wire is attached between two blocks of glass, which are con- Iined by means of a base-plate and removablc supporting-pins within a hanged box of suitable shape, as will be hereinafter explained.

The following description of my invention will enable others skilled in the art to understand it.

In the accompanying drawing, A represents the box of the insulator, which may be made of any suitable size and shape, and which is constructed with wings or anges a a. These wings or flanges are perforated for receiving through them the screws which fasten the box to a telegraph-pole, or to arms secured thereto. The top and sides of this box are closed, but the bottom isl open, and receives into it two blocks, D E, of glass, a metallic baseplate, p, and a suspension bolt or bar, G. The suspension-bar G is constructed with a head, e, which is fitted snugly into a recess formed into the block G and held in place therein by means of the supporting-block E, base-plate p, and bars or pins b b. The block E is centrally perforated, and constructed with a curtain or annular flange, e, on its bottom side, and through this perforation passes the stem of the bar G, which stem may be screw-threaded for receiving a nut, D', on which studs d d are formed.

When the two blocks D and E and the bar G are adjusted in their places inside of the box A, the centrally-perforated base-plate p is adjusted in its place, and the whole are confined by means of the pins b b, which are driven through the box beneath the base-plate;

It will be seen that the head of the suspension bolt or bar G, to which the telegraphwire is attached, is securely confined between two blocks of glass, which insulate the bolt from the box A. These blocks can be readily and cheaply made in molds adapted for that purpose, and they can be readily introduced and secured in their places.

Should the lower block break from any cause, the suspension-bar G, with the wire attached, will drop down, and at once indicate the condition of the insulator, which can be readily repaired on the spot by introducing another block, E, in the place of the broken one.

hile I prefer to construct the blocks D and E of glass, I do not confine myself to this substance, as they may be made ot' other suitable insulating substance.

Having described my invention, what I claim as new, and desire to secure by Let ters Patent, is

The blocks D and E, constructed as described, and having confined between them, in a flanged box, A, the head of a suspensionbar, G, substantially as and for the purposes set forth.

NATHAN HENDRIOKS. litnesses J. R. GILBERT, P. J HAHN, 

